Gas-engine.



, ATENTED JULY 30, 1907. A. N. PARNALL.

GAS ENGINE.

APPLICATION FILED MAY 7. 190e. l

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No.`86l,6'73. I PATENTED JULY 30, 1907. A. N. PARNALL.

GAS ENGINE.

APPLICATION FILED MAY '1. 1906.

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pw? HM? from a quarter to a half of the disks rotary movement.

Fromlthe center of the port 32, I' extend a port 33,

throughV the shell of the machine, a rib 34, being provided on the surface of the cylinder for this port. Thisl port extends to about the central portion of the length f of the cylinder, where it enters the cylinder.

The piston is a long hollow cylindrical shaped piston', with preferably a set of packing rings 19A, at each end, and the upper end of the connecting rod extends into the piston and is pivotally'cennected to it by a pin 35, which extends through the piston. vAt tlmftop of the piston I form a projecting lug, which extends pare.

tially around the top of the cylinder head, and is adapted to deflect the explosive mixture to the top of the cylinder.

, In the cylinder opposite to the inlet entrance of the port, I form a threaded exhaust outlet 36, to which I' thread an exhaust pipe 37; f.

` To the top oi the cylinder head, I attach an electric sparking device of any of the preferred types in use, the device illustrated comprisinga .plug 38, threaded into the center of theA cylinder head, t rough the axle center of which a porcelain or other non-conductive tube is placed, and through this tube I extend and `secure a 'circuit wire, the end of which is extended slightly' below the porcelain tube in proximity to al stroke, 4when the circuit of .the spark'device similar wire secured to the bottom ot the plug,- and to the top-of the'plug threadedly secure a binding screw 40ste which I secure the end of another circuit4 wire, which with the wirenpassing" through the por celain tube, forms al circuit with an ordinary electric current make and break device (not shown), which is arranged to make the current and thereby *cause a yspark when the piston reaches the limitA of its upward movement, as will be understood. v

The operationofmy improved gas engine. is asfollows: The explosive mixture is admitted to the crank chamber fromthe carhureter through the pipe 24, into vthe' crank chamber between the disks, filling the crank chamber full of gas, and as the disk rotates thevalve 2G is actuated by centrifugal force to vary the area ol -the port 2.5,"and thus regulate the supply of gas to the combustion Ichamber'. The gas passes through the port 25 and into the port 33, when the two ports register at each revolution ofthe crank shalt. This gas', however, cannot pass into' the upper. end of fthe 'cylinder until. the piston has passed v the 4entrance of the cylinderlsf.

inlet port, and as the piston makesits downward stroke' i the explosive in ythe crank chamber is'compressed therein untilthel piston .passes the inlet mouth o-the port 33 wheny the explosive vmixture rushes "intmthe cylinder, striking-fthe deflectoi', *which 4is positioned i on the side of thefpiston adjacent to theinlet port and lis directed by thefdeliector to the upper .endg-of; ,the cylinder. vIt is compressed there bythe upwardfstroke of the piston until the piston reaches the v of its causing a/ spark which explodes the gas, and drives the piston downward. Each upward stroke of the piston causes a suction in the crank chamber that draws ai sucientquantity'of the explosive gas from Aone-half of its area, and if the disks reach a higher speed the centrifugal force causes the valve to move only a small volume of gas is admitted to the combustion chamber, which reduces the speed of the engine, and when the speed is thusreduced the spring draws the valve to open the port and admit more gas. Thus the supply of gas is regulated, and the engine thereby caused to run'at a uniform speed. f

In the side ofthe crank chamber, I form anopening 42, which I close with a removable. cover 43,` which is opening allows ready accessto the disks'and the valve lever and valve.

my improved gas engine, I do not wish to be'limited to it, as changes might be made in it without departing from the spirit of my invention.

Having described my invention, what I claim as new and desire to secure by Letters Patent is:

ance with the speed ot the engine.

3. ln a two-cycle explosive engine, av crank disk-normally closing vthe passage from the crank case to the exdisk movable to open communicationk between the crank case and the explosion chamber ot the engine, vand a centrifugi'governor carried by ,said crank disk and constructed to throttle said port in proportion to the 'speed -of the engine.

ing, the explosive mixtng through the croniche, a dish carried by thecra'nk lShaft and normally", coverinfth'e. ,passage fromtherani ,case to the explosion chambery( port ',inisa'il disk movjble to open communication between `spring-cnitrolieri valve'lor said port movable to *coverl solid action vof Athe 'spring.'1

In testimony-.whereof I am! my signature in presence of two witnesses. v Y

- v ALPREDN. PARNALL f Witnesses I G. Samana: ELLIOTT,

' made.

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plosion chamber of the engine, a valved port in said crank 4. In an explosive engie'of the two-cycle type resolv#I port by-centrifugal-action and to 'uncoverfsid port bytheV the 'carbureter into the crank chamber to make a` position that closes the port 25 to the extent ofabout Aout further, and thereby so reduce the port 25 that bolted to the casing of thechamber by bolts 44. This While Il have `illustrated. a preferred construction `of tor varying the eective aperture of said port in accord reo anli ,case and tle explosion chamber, and n weighted, 

